#216DBB
Closest named color: Mid Blue (#276AB3). oklch(53.1% 0.142 252.9), rgb(33, 109, 187).
Aa
White text reads best on this color (5.29:1).
About this color
#216DBB is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.142 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.014 away. White text reads best on it, at 5.29:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.96:1 |
| White text | 5.29:1 |
Values
| HEX | #216DBB |
| RGB | rgb(33, 109, 187) |
| HSL | hsl(210, 70%, 43%) |
| OKLCH | oklch(53.1% 0.142 252.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #216DBB | 5.29:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #216DBB | 3.96:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #216DBB text on white | 5.29:1 | AA | Lc 75.8 | Fine for body text |
| #216DBB text on black | 3.96:1 | AA large text | Lc -25.9 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A4C4EA
oklch(81% 0.064 253)
-
Step 400
400
#71A4DF
oklch(70.6% 0.103 252.8)
-
Step 500
500
#4A8CD6
oklch(63% 0.131 252.9)
-
Step 600
600 (this color)
#216DBB
oklch(53.1% 0.142 252.9)
-
Step 700
700
#1C62A9
oklch(49.2% 0.132 252.7)
-
Step 800
800
#1A5089
oklch(42.7% 0.11 252.9)
-
Step 900
900
#1C436D
oklch(37.7% 0.085 252.5)
-
Step 950
950
#122740
oklch(26.9% 0.054 254)
#216DBB with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4673BE | 0.037 |
| Deuteranopia (no green cones) | #2B65B9 | 0.021 |
| Tritanopia (no blue cones) | #00808B | 0.106 |
| Achromatopsia (no color) | #6B6B6B | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #216DBB
#216DBB
oklch(53.1% 0.142 252.9)
- #936000
#936000
oklch(53.1% 0.113 73.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #216DBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.014
- French Blue #436BAD ΔE 0.032
- Windows Blue #3778BF ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.043
- Nice Blue #107AB0 ΔE 0.044
- Muted Blue #3B719F ΔE 0.051
- Ocean Blue #03719C ΔE 0.055
- Peacock Blue #016795 ΔE 0.064
Use #216DBB in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.